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Fig. 1.


Time-evolution of representative coronal field lines (top row) and of the double-J shaped QSL footprints (bottom row) during the modeled flare, from the eruption onset (left) up to the end of the simulation (right). The pink (resp. orange) field lines correspond to the external edge of the flux-rope as it is at the eruption onset (resp. at the end of the simulation). The green field lines correspond to overlaying arcades at the eruption onset. The QSL footprints are represented by the squashing degree Q, with a logarithmic grayscale color coding with gray-white standing for logQ = ⟨0; 4⟩, and with black areas mapping the footpoints of field lines that leave the full numerical domain. The polarity inversion line (PIL) and the relevant hook and ribbon portions QSL footprints are labeled, and the displacements of the latter are indicated by arrows.

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